According to CNN's exclusive report, Saudi Arabia and its coalition partners allegedly gave militants linked to al-Qaeda* terrorist group, Salafi militias and other factions in Yemen weapons that were manufactured by the United States, in breach of its arms agreements with Washington.
The investigation also found that USA weapons also made their way into the hands of Iranian-backed rebels who are battling the Gulf coalition for control of the country, exposing some of America's sensitive military technology to Tehran.
Saudi Arabia and its coalition partners, including the United Arab Emirates, are using the American weapons as a way to buy the loyalty of militias or tribes, support their allies and influence the political landscape, CNN reported, citing local commanders and military analysts.
The Saudis are violating the terms of arms sales with the U.S. by giving the weapons to third parties, the Department of Defense confirmed to CNN.
"Should Congress pursue greater restrictions on offensive weapons to the Saudi coalition?" asked Engel, who as chairman has the right to review and put "holds" on major foreign weapons sales.
Addressing those potential war crimes, committee chair Rep. Eliot Engel (D-N.Y.) said, "We can not look the other way when it comes to the recklessness with which the Saudi-led coalition has conducted its operations".
The US State Department, meanwhile, said it was investigating the allegations.
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Other weapons used by UAE-allied militias in Hodeidah include Serbian-made Zastava MO2 Coyote machine guns and the Agrab armoured-truck-mounted Singaporean 120mm mortar system - the UAE is the only country known to purchase this combined weapon system.
Starting under the Obama administration in 2015, the Pentagon has provided logistical, targeting and intelligence support to the Saudi-led coalition in Yemen.
President Donald Trump's administration opposed numerous bills, calling the Saudis important regional partners and praising weapons sales as an important source of U.S.jobs. He said, "It can no longer be business as usual.
They've killed more civilians this year than any year prior in the Yemen war", Democratic Senator Chris Murphy said after a November Senate vote advancing a measure to end American military support for the Saudi-led intervention in Yemen.
"This is our very first committee action and we're getting ready to take an action that is going to have detrimental consequences without really thinking it through", the Illinois Republican warned.
In December, a similar bill cleared the Senate in a 56-41 vote but was blocked by the House, which was then under the control of Republicans.
Many Republican members on the committee criticized the way the resolution was crafted, saying the Democratic majority was trying to dictate foreign policy to the president in a conflict in which US troops are not directly involved.